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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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HOW TO CONVERT CAPACITOR START MOTOR WINDING TO PERMANENT SPLIT CAPACITOR MOTOR WINDING [on hold]

I have a best brand capacitor start motor (02 Pole, 24 Slots, 01 hp, Double layer Running SWG - 22.5 and 22, Auxiliary swg - 25) and burnt out it's centrifugal switch and all windings. Before ...
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40 views

Washing machine problem [on hold]

I have the following washing machine. - it rotates in one direction but it need help with my hand - the other direction it doesn't rotate at all - the mechanical timer works very well Can ...
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1answer
39 views

what would happen if I used a rheostat in series with a motor to drop my 230v ac supply to 110v ac?

I realize that I would be running higher (a little more than double) current through the motor I'm just curious if it would damage my motor? The motor is a 1 hp, 110V/60Hz driving a meat grinder.
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24 views

BLDC startup algorithm

How do real world algorithms for sensorless BLDC motors handle startup under load? Right now I run phase 1 for a few milliseconds to get the rotor in a known position, the I run open loop for a ...
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3answers
36 views

bldc regenerative braking, braking torque

I'm trying to figure out the braking torque calculation for a BLDC simulation. Now if I'm looking at a datasheet I know the torque at a given rpm at acceleration. If I brake with regenerative breaking ...
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2answers
64 views

Is there a motor design where a rotor gradually moves into a stater?

I was wondering if there is a motor/generator design where the rotor moves gradually in and out of the stator along the axis of rotation, or the stator over the rotor, but the primary motion is rotary,...
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1answer
28 views

what is field exitation type of 775 DC motor?

There are different types of field exitation modes. Some of them are Shunt wound series wound and permanent type So, what type of motor is 775 DC motor? i have tried to search the type from ...
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3answers
61 views

Speed limiter - 24v Motors

I'm looking for a way to limit the speed of some wheelchair motors in order to gain better control when using them in my RC device. Currently the motors are very sharp and don't ramp up to speed, ...
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1answer
21 views

calculation of torque constant based on bldc datasheet, getting different torque constants

I'm trying to get the torque constant of a bldc. Based on this: how to read datasheet I just divide the torque at any given point with the current. I tried out that method with different values and ...
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1answer
41 views

Pre charge resistor switch

I have a 12V 40A motor. I have a switch between the motor controller and the battery. I want to put a pre charge resistor in the path. Like in the figure. My questions are: 1) The pre charge ...
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1answer
39 views

Motor / VFD / Protective Earth

I have little experience with AC motors since I'm majoring in Mech.E. My team is setting up an AC motor with a VFD to control the movement of an airfoil inside a metal cage we built. I understand the ...
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1answer
42 views

Design of a motor SPDT switch that can be triggered by 5 V or 3.3 V digital output

Problem: I am designing the electrical system for a vehicle that has 12 brushed dc motors / linear actuators, they are driven by 6 identical dual-channel motor driver boards, that provide a maximum ...
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1answer
47 views

torque required to rotate a linear actuator slide [closed]

We want to choose stepper motor or servo motor for rotating a linear actuator slide given below which is of weight 5kg. https://www.3dprintronics.com/Linear-Actuator-Ball-Screw-1204-p108536003 The ...
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2answers
40 views

BLDC Motor max load

Hi i have a BLDC moter https://www.banggood.com/350W-48V-DC-Brushless-Motor-Geared-Ebike-Tricycle-Kit-Engine-Electric-Scooter-p-1419702.html?akmClientCountry=NL&rmmds=cart_middle_products&...
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1answer
45 views

VHS(C) tape speed issues - how does the speed change for different modes?

I have a VHS-C camcorder that has a lot of trouble keeping constant speed for the main tape motor (even with the battery fully charged). Most of the time it's way too fast (similar to fast forwarding),...
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1answer
579 views

Would the motor reverse if phases swapped for this case?

A servomotor power connection pins are given as follows: U V W are the three phase terminals. Would the motor reverse if I mistakenly swap phases U and V namely if I connect pin 1 to W and pin 3 to U?...
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1answer
33 views

motor or actuator which fits these specifications [duplicate]

This is a repeat question with more details; As a hobbyist and blissfully ignorant of electrical engineering, I wonder if someone out there is willing to give me some feedback? Is there a battery ...
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1answer
67 views

Don't know which transistor I should use

I am new to transistors. I want to know which transistor I should use which will suffice for my H bridge. My motor draws 1.2A at 6V when stalled.
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4answers
39 views

How do you drive a variable reluctance stepper/SRM as a generator?

I think I understand the principles, even if not the details, of operating a VR/SRM as a motor. But I don't understand, and can't find any good explanation online of, the principles for how to use one ...
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1answer
63 views

Attiny85 crashes when I run a motor through an L293D

I'm trying to run a motor through an L293D turned on and off by an Attiny85. The Attiny85 has the micronucleus bootloader on it, which is why pin 3 is connected to a pull up resistor. On the Attiny ...
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3answers
71 views

Motor Voltage and Current Limit of Brushed DC Motor

What fundamentally limits the applicable voltage in a motor? From what I understand, the input to the motor is a relatively constant impedance (since speed is on the order of 100 Hz) and it is ...
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1answer
31 views

Proper Way to Drive this H bridge

MIC4605-2YM Datasheet Given the circuit above what is the proper way to drive this H bridge in a manner where I can change the motor direction. the datasheet shows a sample circuit of a full H bridge ...
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1answer
40 views

Can you power ac motor in ev with ac generator? [closed]

Can a smaller ev with ac motor be powered by an ac gen instead of using a battery pack and everything that would go along with it? If so, what would the arrangement be going from gen to motor?
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3answers
85 views

How to control BTS7960 43A motor driver directions?

The board has two PWM inputs, see: Do I have to use four pins to control two motors? Thanks
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0answers
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Help with modeling a 6-phase motor in Simulink

I'm not sure if I'm posting in the right subsection, however I've recently started working on a project. I have little background on the subject. I've a degree in electronics which mainly focused on ...
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1answer
45 views

Loading an Asynchronous Generator

I am doing an experiment that involves loading an asynchronous 50 HZ generator. For the load to consume current it has to be a capacitive load to cause a phase shift between the current and the ...
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1answer
63 views

Stepper Motors (NEMA-17) Won't Run When Wheels Are Attached

My team and I are creating a robot using 4 stepper motors with mecanum wheels and an Arduino Uno. The code appears to be correct, and the motors seem to run just fine on their own, but once we screw ...
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1answer
42 views

How does force feedback [hardware] work?

Force feedback steering wheels are fairly common, but I don't understand how they work. Specifically, how does a "direct drive"($$$) steering wheel apply a force one way while moving in another ...
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2answers
74 views

If a 110 volt motor asks for 4W does that mean I will have to change the wall power? [closed]

I am new to electronics like motors so help on how to set this up would be awesome.
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0answers
48 views

stepper motor driver heats up

I have this motor driver design set up on a breadboard for a bipolar stepper motor. I was able to drive the motor forwards and backwards for about 5 minutes. I realized that two of the P mosfets were ...
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3answers
66 views

What are differences between neodym motor wheels and copper motors?

I want to learn about electrical wheels, typically used in electric bicycles. But most of information I could find is related to marketing, and nothing on theory. This is probably due to "relative ...
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0answers
21 views

Motor-side of BLAC supply goes into overvoltage when regenrative braking using an LM5060

I am currently using an LM5060 for protection of the motor supply on my BLAC motor driver. Everything works well until I decelerate the motor quickly, this makes the supply voltage peak above the OVP ...
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How to read Torque-Power diagram for an asynchronous motor

I'm sorry if my question is too stupid, but I am not able to correctly understand how to compare the information showed by the torque-power diagram with the motor test data for a 2000W Asynchronous ...
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1answer
32 views

3 Phase PMSM Motor Current Measurement: Figuring out the 2 negative terminal currents with 1 positive current measurement

I am trying to implement F.O.C for a PMSM machine with a custom made inverter board. The H-bridges are from Infineon (IFX007T) and they provide current sensing capabilities. The problem is, i need the ...
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Wiring AC motors in parallel

I am having some Somfy motorized curtains installed in my home, but I struggle to understand the following statement in the manual: Wiring multiple Sonesse 40 WT's in parallel will result in damage ...
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3answers
61 views

Use a TRIAC to connect/disconnect a capacitor to a PSC motor

In the image above, we see a PSC motor, with its 3 terminals, connected to a control board. This board has a RUN capacitor always connected to the motor. When the motor has to turn, the board applies ...
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2answers
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Why isn't fast decay mode on an h bridge damaging

I'm struggling to understand how fast decay mode works on an h-bridge used for stepper motors . Particularly I've been looking at fast decay mode in this data sheet: http://www.ti.com/lit/an/slva321/...
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3answers
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How does one determine the type (AC v. DC) and operating voltage of small motors?

I've become fascinated by Rolling Ball Sculpture (RBS) and plan to start building my first one soon. Typically a RBS uses a low-voltage, low-RPM motor to carry the marbles to the top of the structure ...
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42 views

What model of stepper motor is this?

I am salvaging a stepper motor I found however I don't know what model it is. I tried google the number at the bottom of the motor, but nothing came out.
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1answer
54 views

Some questions about a servo motor driver input ratings

A servomotor drive input can be supplied either 3-phase or single phase. The photo of the driver nameplate is shown as follows: Does that mean in full/nominal load if this drive is supplied single-...
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2answers
106 views

3 phase motor change from 440 V to 220 V with diagram question

Some confusion the way my new machine is wired. I bought a sander not hooked up and the guy thought it was wired at 440. I need to set it to 220. The motor says 220/440. I have 220 at my shop with ...
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4answers
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Will switching a LED on and off at a said frequency reduce or increase heat loss?

In my case, a 50W 34V LED is being used to light a small box. To reduce heat generated by the LED, we are switching it on and off at 50Hz. But I was wondering will this actually help? In the case of ...
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3answers
2k views

Confusion with the nameplate of an induction motor

Regarding the below nameplate of an induction motor: What is meant by?: Δ/Y 220/380 Does that mean if delta connected the line to line voltage must be 220V? Im confused also because isnt 220 ...
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1answer
70 views

Driving a motor backwards and forwards using mosfet and Arduino pin safety

So I want to drive a motor from a handheld drill/screwdriver. And I have managed to get it going using the first schematics, and using pwm to control the speed. The Zener diode is there to protect ...
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0answers
21 views

Uncertainty in current values of Power HD digital servo motor

In a project, we want to lift the load of 5 kg on the ground to half a meter. For this purpose, we use a 360-degree rotating PowerHD digital servo motor with a stall torque of 20 kg / cm. Motor ...
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0answers
82 views

Converting 0-5V PWM to 0-10V PWM using Arduino and Mosfet not working

I am trying to convert 0-5V PWM coming from an Arduino to 0-10V PWM to run a motor which has PWM line that operate for 0-10V. But as soon as I connect the PWM line to mosfet it either shows only ...
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1answer
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Where does an IN5408 diode go in a hobby motor, on/off switch and AA battery holder setup?

I was told I need to add an IN5408 diode in the following setup but I am unsure where it goes. 2xAA battery pack Positive to On/Off Switch (simple open close circuit switch) To small hobby motor ...
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I have designed and 3D printed a new motor that was based on a video i saw earlier, however motor keeps stuttering and wont turn, what went wrong?

Figure 1 Figure2 I started by doing 150 turns on each coil making sure they were winded in the same direction, then connected the starting point of each coil together and took each phase winding to ...
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2answers
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Relationship Between Number of Coil Turns in DC Motor and the Efficiency of Energy Retrieval From Regenerative Braking

When learning about regenerative braking, I began to ponder as to what the relationship between the number of turns in the coil of a DC motor is to the efficiency of kinetic energy retrieval from the ...
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PMSM motor current calculated by D axis and Q axis current

Now, I know d and q axis current can be calculated by phase current ia, ib, ic in a PMSM, via clarke transform and park transform. ialpha = sqrt(2/3) * (ia - ib / 2 - ic / 2) ibeta = sqrt(1/2) * (ib ...